python-docutils: create .exe launchers for all scripts

and port to build/installer while at it

motivated by virt-manager calling them without an interpreter
The next docutils will have a central .exe launcher and the old scripts
will be deprecated, so this should fix itself over time.

mingw-w64-python-docutils/pyscript2exe.py

@@ -0,0 +1,19 @@
+"""
+Creates an exe launcher for Python scripts for the executing interpreter.
+foobar.py -> foobar.exe + foobar-script.py
+"""
+
+import sys
+import re
+import os
+from setuptools.command.easy_install import get_win_launcher
+
+path = sys.argv[1]
+with open(path, "rb") as f:
+    data = f.read()
+with open(path, "wb") as f:
+    f.write(re.sub(b"^#![^\n\r]*", b'', data))
+root, ext = os.path.splitext(path)
+with open(root + ".exe", "wb") as f:
+    f.write(get_win_launcher("cli"))
+os.rename(path, root + "-script.py")